Using my phone is US

[CN2]

I am in the US and want to use my pay monthly UK phone for wifi and photos....no calls....is there a charge? 

[MI5 · Accepted solution]

Yes, you can have O2 travel for £4.99 a day or pay standard rates.
Details here http://international.o2.co.uk/internationaltariffs/travelling_abroad

If you can find free wifi, put phone in airplane mode so there is no risk of the mobile network connecting.

A single text, 1mb of data or a call will incur the charges though.

[jonsie]

No charge for just using for photos and wifi. Switch off mobile/cellular data. 

[Bambino]

@CN2 Follow the advice given above. If you want to be sure you won't be charged for anything, take your sim out of the phone and put it in a safe place. Nano sims are easy to lose, so make sure you remember where you put it.

[CN2]

Thank you Bambino